Armstrong Furnace ALPKT574-3 Conversion Kit

The Armstrong Furnace ALPKT574-3 Conversion Kit is a critical component for field-converting high-efficiency gas furnaces from natural gas to liquid propane (LP) operation. Engineered for precise fuel-to-air ratios, this LP gas conversion kit ensures stable combustion and prevents soot accumulation or heat exchanger fouling common with improper venting or fuel delivery. Designed specifically for Armstrong Air and AirEase equipment, the kit includes the necessary main burner orifices, a heavy-duty gas valve spring kit, and comprehensive conversion labeling to ensure NFPA 54 compliance. Whether you are servicing a 90% AFUE furnace or a standard 80% model, this kit provides the technical tolerances required to maintain BTU output consistency. Technicians must verify the manufacturer’s data plate to ensure manifold pressure is adjusted within the 10.0" to 11.0" W.C. range post-installation to prevent over-firing and ensure long-term HVAC system reliability.

• Precision Machined Orifices: Provides the specific LP gas flow rate required to prevent burner resonance and ensure quiet ignition.
• System Compatibility: Validated for use with specific Armstrong furnace gas valves, ensuring seamless integration with existing control boards.
• Safety Compliance: Includes pressure regulator conversion components and gas conversion labeling to meet residential code requirements.
• High Altitude Performance: Maintains consistent combustion efficiency across various atmospheric conditions when properly calibrated.

Does this kit include the pressure switch?
This kit focuses on the gas manifold and valve transition; refer to the specific furnace manual to determine if a separate high-altitude pressure switch is required for your installation site.

What manifold pressure is required after installing the ALPKT574-3?
Standard LP operation typically requires a manifold pressure of 10" W.C. Always use a digital manometer to verify values against the cabinet nameplate during commissioning.

Is this compatible with White-Rodgers or Honeywell valves?
The ALPKT574-3 is designed for specific valve architectures used in Armstrong equipment. Check the manufacturer's cross-reference guide to ensure the spring kit matches your specific valve model.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.